Proof/logic
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To prove a statement "If P then Q", it is valid to prove which of the following statements instead?
A. If not Q then not P
B. If Q then P
C. If not P then not Q
D. Q only if P
E. Both P and Q are true
https://brainmass.com/math/discrete-math/proof-logic-15913
Solution Summary
This discusses how to proof one conditional by proving a similar conditional.
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